Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '230b4769898558a0fec597a581b6aebccd4204e929dfe5dbb3b5399f56a6d829' 
  AND token = '6bkUwwsIZ83D8w20n+Blbtz+B/XiMPK6msHxwwrNbvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}